I have a computer with an Iwill VD133 motherboard doingUSB-to-PS/2 keyboard emulation (built into the chipset somewhere)for a BTC 7932M USB keyboard. Under this configuration, theSETLEDS command in atkbd_probe fails (the first atkbd_sendbytein atkbd_command fails), but the keyboard otherwise works ifthat failure is ignored.

I noticed this when my keyboard stopped working in 2.5.32.I have verified that 2.5.31 (and probably all kernels before it)also do not set the LEDs on my USB-emulating-PS/2 keyboard.

I cannot say whether the problem occurs with other USBkeyboards because I don't have one handy.

One cannot run the USB keyboard "natively" via Linux USB on thismotherboard because the BIOS does not seem to set an IRQ line for the USBcontroller. I've tried booting with "pci=biosirq", and I think I've triedall the relevant BIOS menu options, and I'm running the latest BIOS,and the VD133 product has been terminated. So the patch does seem to be"necessary" to support some configurations, at least for now.

/*- * Next we check we can set LEDs on the keyboard. This should work on every- * keyboard out there. It also turns the LEDs off, which we want anyway.+ * Turn off LEDs. This command fails on at least a BTC 7932M USB keyboard+ * connected to an Iwill VD133 motherboard that is configured to emulate+ * a PS/2 keyboard via USB. */